Medium
Security advisory
Rocket.Chat through 3.4.2 allows XSS where an attacker can send a specially crafted message to a channel or in a direct message to the client which results in remote code execution on the client side.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-15926
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 10:54 UTC · Revision 1
Source evidence
Rocket.Chat through 3.4.2 allows XSS where an attacker can send a specially crafted message to a channel or in a direct message to the client which results in remote code execution on the client side.
osv:CVE-2020-15926
Complete source record
{
"id": "a30dbed783088a8603c0190503f811664bbd60d67c4ed86b843c98f6b01ceaab",
"url": "https://osv.dev/vulnerability/CVE-2020-15926",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-15926",
"summary": "Rocket.Chat through 3.4.2 allows XSS where an attacker can send a specially crafted message to a channel or in a direct message to the client which results in remote code execution on the client side.",
"evidence": "osv:CVE-2020-15926",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-15926",
"aliases": [
"CVE-2020-15926"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/rocketchat/rocket.chat",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "e5f93d3f5e31172404622c06ebec5b5c9f24143d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "3.4.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"0.74.3",
"3.4.2",
"3.4.1",
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"3.3.3",
"3.3.2",
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"0.59.6",
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"0.59.4",
"0.59.3",
"0.59.2",
"0.59.1",
"0.59.0",
"0.58.2",
"0.58.1",
"0.58.0",
"0.57.2",
"0.57.1",
"0.57.0",
"0.56.0",
"0.56.0-rc.7",
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"0.56.0-rc.4",
"0.56.0-rc.3",
"0.56.0-rc.2",
"0.56.0-rc.1",
"0.56.0-rc.0",
"0.54.1",
"0.54.0",
"0.50.0",
"0.49.4",
"0.49.3",
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"0.49.1",
"0.49.0",
"0.48.0",
"0.46.0",
"0.45.0",
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"0.42.0",
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"0.40.1",
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"0.39.0",
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"0.37.0",
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"0.30.0",
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"0.13.0",
"0.11.0",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15926.json"
}
}
],
"modified": "2026-10-20T10:51:57.939913394Z",
"provider": "osv",
"references": [
"https://github.com/RocketChat/Rocket.Chat/commits/develop",
"https://github.com/RocketChat/Rocket.Chat/pull/18356",
"https://blog.redteam.pl/2020/08/rocket-chat-xss-rce-cve-2020-15926.html"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-15926",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 383170,
"published_at": "2020-08-18T21:15:12.16+00:00"
}